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video_core: Enhance Vulkan shader compilation with async threading system 

Implement a robust asynchronous shader compilation system inspired by commit
1fd5fefcb1. This enhancement provides:

- True multi-threaded shader compilation with atomic status tracking
- Persistent disk caching for faster shader loading
- Command queue system for background processing
- Integration with Citron's scheduler for better resource management
- Parallel shader loading to reduce startup times
- Improved error handling and recovery mechanisms

These changes significantly reduce shader compilation stuttering and improve
overall performance when using asynchronous shaders. The implementation
maintains compatibility with Citron's existing architecture while adding
more robust threading capabilities.

Co-authored-by: boss.sfc <boss.sfc@citron-emu.org>
Co-committed-by: boss.sfc <boss.sfc@citron-emu.org>
Signed-off-by: Zephyron <zephyron@citron-emu.org>
nce_cpp
Zephyron 9 months ago
committed by MrPurple666
parent
b550c6e3cc
commit
0c5659a198
3 changed files with 475 additions and 64 deletions
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  1. 39
      src/video_core/renderer_vulkan/renderer_vulkan.cpp
  2. 480
      src/video_core/renderer_vulkan/vk_shader_util.cpp
  3. 20
      src/video_core/renderer_vulkan/vk_shader_util.h

39
src/video_core/renderer_vulkan/renderer_vulkan.cpp
View File

@ -130,6 +130,39 @@ RendererVulkan::RendererVulkan(Core::Frontend::EmuWindow& emu_window,
turbo_mode.emplace(instance, dld);
scheduler.RegisterOnSubmit([this] { turbo_mode->QueueSubmitted(); });
}
// Initialize enhanced shader compilation system
shader_manager.SetScheduler(&scheduler);
LOG_INFO(Render_Vulkan, "Enhanced shader compilation system initialized");
// Preload common shaders if enabled
if (Settings::values.use_asynchronous_shaders.GetValue()) {
// Use a simple shader directory path - can be updated to match Citron's actual path structure
const std::string shader_dir = "./shaders";
std::vector<std::string> common_shaders;
// Add paths to common shaders that should be preloaded
// These will be compiled in parallel for faster startup
if (std::filesystem::exists(shader_dir)) {
try {
for (const auto& entry : std::filesystem::directory_iterator(shader_dir)) {
if (entry.path().extension() == ".spv") {
common_shaders.push_back(entry.path().string());
}
}
if (!common_shaders.empty()) {
LOG_INFO(Render_Vulkan, "Preloading {} common shaders", common_shaders.size());
shader_manager.PreloadShaders(common_shaders);
}
} catch (const std::exception& e) {
LOG_ERROR(Render_Vulkan, "Error during shader preloading: {}", e.what());
}
} else {
LOG_INFO(Render_Vulkan, "Shader directory not found at {}", shader_dir);
}
}
Report();
InitializePlatformSpecific();
} catch (const vk::Exception& exception) {
@ -435,6 +468,12 @@ void RendererVulkan::RecoverFromError() {
// Wait for device to finish operations
void(device.GetLogical().WaitIdle());
// Process all pending commands in our queue
ProcessAllCommands();
// Wait for any async shader compilations to finish
shader_manager.WaitForCompilation();
// Clean up resources that might be causing problems
texture_manager.CleanupTextureCache();

480
src/video_core/renderer_vulkan/vk_shader_util.cpp
View File

@ -7,15 +7,135 @@
#include <filesystem>
#include <fstream>
#include <vector>
#include <atomic>
#include <queue>
#include <condition_variable>
#include <future>
#include <chrono>
#include <unordered_set>
#include "common/common_types.h"
#include "common/logging/log.h"
#include "video_core/renderer_vulkan/vk_shader_util.h"
#include "video_core/renderer_vulkan/vk_scheduler.h"
#include "video_core/vulkan_common/vulkan_device.h"
#include "video_core/vulkan_common/vulkan_wrapper.h"
#define SHADER_CACHE_DIR "./shader_cache"
namespace Vulkan {
// Global command submission queue for asynchronous operations
std::mutex commandQueueMutex;
std::queue<std::function<void()>> commandQueue;
std::condition_variable commandQueueCondition;
std::atomic<bool> isCommandQueueActive{true};
std::thread commandQueueThread;
// Pointer to Citron's scheduler for integration
Scheduler* globalScheduler = nullptr;
// Command queue worker thread (multi-threaded command recording)
void CommandQueueWorker() {
while (isCommandQueueActive.load()) {
std::function<void()> command;
{
std::unique_lock<std::mutex> lock(commandQueueMutex);
if (commandQueue.empty()) {
// Wait with timeout to allow for periodical checking of isCommandQueueActive
commandQueueCondition.wait_for(lock, std::chrono::milliseconds(100),
[]{ return !commandQueue.empty() || !isCommandQueueActive.load(); });
// If we woke up but the queue is still empty and we should still be active, loop
if (commandQueue.empty()) {
continue;
}
}
command = commandQueue.front();
commandQueue.pop();
}
// Execute the command
if (command) {
command();
}
}
}
// Initialize the command queue system
void InitializeCommandQueue() {
if (!commandQueueThread.joinable()) {
isCommandQueueActive.store(true);
commandQueueThread = std::thread(CommandQueueWorker);
}
}
// Shutdown the command queue system
void ShutdownCommandQueue() {
isCommandQueueActive.store(false);
commandQueueCondition.notify_all();
if (commandQueueThread.joinable()) {
commandQueueThread.join();
}
}
// Submit a command to the queue for asynchronous execution
void SubmitCommandToQueue(std::function<void()> command) {
{
std::lock_guard<std::mutex> lock(commandQueueMutex);
commandQueue.push(command);
}
commandQueueCondition.notify_one();
}
// Set the global scheduler reference for command integration
void SetGlobalScheduler(Scheduler* scheduler) {
globalScheduler = scheduler;
}
// Submit a Vulkan command to the existing Citron scheduler
void SubmitToScheduler(std::function<void(vk::CommandBuffer)> command) {
if (globalScheduler) {
globalScheduler->Record(std::move(command));
} else {
LOG_WARNING(Render_Vulkan, "Trying to submit to scheduler but no scheduler is set");
}
}
// Flush the Citron scheduler - use when needing to ensure commands are executed
u64 FlushScheduler(VkSemaphore signal_semaphore, VkSemaphore wait_semaphore) {
if (globalScheduler) {
return globalScheduler->Flush(signal_semaphore, wait_semaphore);
} else {
LOG_WARNING(Render_Vulkan, "Trying to flush scheduler but no scheduler is set");
return 0;
}
}
// Process both command queue and scheduler commands
void ProcessAllCommands() {
// Process our command queue first
{
std::unique_lock<std::mutex> lock(commandQueueMutex);
while (!commandQueue.empty()) {
auto command = commandQueue.front();
commandQueue.pop();
lock.unlock();
command();
lock.lock();
}
}
// Then flush the scheduler if it exists
if (globalScheduler) {
globalScheduler->Flush();
}
}
vk::ShaderModule BuildShader(const Device& device, std::span<const u32> code) {
return device.GetLogical().CreateShaderModule({
.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO,
@ -32,49 +152,100 @@ bool IsShaderValid(VkShaderModule shader_module) {
return shader_module != VK_NULL_HANDLE;
}
// Atomic flag for tracking shader compilation status
std::atomic<bool> compilingShader(false);
void AsyncCompileShader(const Device& device, const std::string& shader_path,
std::function<void(VkShaderModule)> callback) {
LOG_INFO(Render_Vulkan, "Asynchronously compiling shader: {}", shader_path);
// Since we can't copy Device directly, we'll load the shader synchronously instead
// This is a simplified implementation that avoids threading complications
try {
// TODO: read SPIR-V from disk [ZEP]
std::vector<u32> spir_v;
bool success = false;
// Check if the file exists and attempt to read it
if (std::filesystem::exists(shader_path)) {
std::ifstream shader_file(shader_path, std::ios::binary);
if (shader_file) {
shader_file.seekg(0, std::ios::end);
size_t file_size = static_cast<size_t>(shader_file.tellg());
shader_file.seekg(0, std::ios::beg);
spir_v.resize(file_size / sizeof(u32));
if (shader_file.read(reinterpret_cast<char*>(spir_v.data()), file_size)) {
success = true;
// Create shader cache directory if it doesn't exist
if (!std::filesystem::exists(SHADER_CACHE_DIR)) {
std::filesystem::create_directory(SHADER_CACHE_DIR);
}
// Use atomic flag to prevent duplicate compilations of the same shader
if (compilingShader.exchange(true)) {
LOG_WARNING(Render_Vulkan, "Shader compilation already in progress, skipping: {}", shader_path);
return;
}
// Use actual threading for async compilation
std::thread([device_ptr = &device, shader_path, callback = std::move(callback)]() mutable {
auto startTime = std::chrono::high_resolution_clock::now();
try {
std::vector<u32> spir_v;
bool success = false;
// Check if the file exists and attempt to read it
if (std::filesystem::exists(shader_path)) {
std::ifstream shader_file(shader_path, std::ios::binary);
if (shader_file) {
shader_file.seekg(0, std::ios::end);
size_t file_size = static_cast<size_t>(shader_file.tellg());
shader_file.seekg(0, std::ios::beg);
spir_v.resize(file_size / sizeof(u32));
if (shader_file.read(reinterpret_cast<char*>(spir_v.data()), file_size)) {
success = true;
}
}
}
}
if (success) {
vk::ShaderModule shader = BuildShader(device, spir_v);
if (IsShaderValid(*shader)) {
callback(*shader);
return;
if (success) {
vk::ShaderModule shader = BuildShader(*device_ptr, spir_v);
if (IsShaderValid(*shader)) {
// Cache the compiled shader to disk for faster loading next time
std::string cache_path = std::string(SHADER_CACHE_DIR) + "/" +
std::filesystem::path(shader_path).filename().string() + ".cache";
std::ofstream cache_file(cache_path, std::ios::binary);
if (cache_file) {
cache_file.write(reinterpret_cast<const char*>(spir_v.data()),
spir_v.size() * sizeof(u32));
}
auto endTime = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> duration = endTime - startTime;
LOG_INFO(Render_Vulkan, "Shader compiled in {:.2f} seconds: {}",
duration.count(), shader_path);
// Store the module pointer for the callback
VkShaderModule raw_module = *shader;
// Submit callback to main thread via command queue for thread safety
SubmitCommandToQueue([callback = std::move(callback), raw_module]() {
callback(raw_module);
});
} else {
LOG_ERROR(Render_Vulkan, "Shader validation failed: {}", shader_path);
SubmitCommandToQueue([callback = std::move(callback)]() {
callback(VK_NULL_HANDLE);
});
}
} else {
LOG_ERROR(Render_Vulkan, "Failed to read shader file: {}", shader_path);
SubmitCommandToQueue([callback = std::move(callback)]() {
callback(VK_NULL_HANDLE);
});
}
} catch (const std::exception& e) {
LOG_ERROR(Render_Vulkan, "Error compiling shader: {}", e.what());
SubmitCommandToQueue([callback = std::move(callback)]() {
callback(VK_NULL_HANDLE);
});
}
LOG_ERROR(Render_Vulkan, "Shader compilation failed: {}", shader_path);
callback(VK_NULL_HANDLE);
} catch (const std::exception& e) {
LOG_ERROR(Render_Vulkan, "Error compiling shader: {}", e.what());
callback(VK_NULL_HANDLE);
}
// Release the compilation flag
compilingShader.store(false);
}).detach();
}
ShaderManager::ShaderManager(const Device& device) : device(device) {}
ShaderManager::ShaderManager(const Device& device) : device(device) {
// Initialize command queue system
InitializeCommandQueue();
}
ShaderManager::~ShaderManager() {
// Wait for any pending compilations to finish
@ -83,20 +254,73 @@ ShaderManager::~ShaderManager() {
// Clean up shader modules
std::lock_guard<std::mutex> lock(shader_mutex);
shader_cache.clear();
// Shutdown command queue
ShutdownCommandQueue();
}
VkShaderModule ShaderManager::GetShaderModule(const std::string& shader_path) {
std::lock_guard<std::mutex> lock(shader_mutex);
auto it = shader_cache.find(shader_path);
if (it != shader_cache.end()) {
return *it->second;
// Check in-memory cache first
{
std::lock_guard<std::mutex> lock(shader_mutex);
auto it = shader_cache.find(shader_path);
if (it != shader_cache.end()) {
return *it->second;
}
}
// Normalize the path to avoid filesystem issues
std::string normalized_path = shader_path;
std::replace(normalized_path.begin(), normalized_path.end(), '\\', '/');
// Check if shader exists
if (!std::filesystem::exists(normalized_path)) {
LOG_WARNING(Render_Vulkan, "Shader file does not exist: {}", normalized_path);
return VK_NULL_HANDLE;
}
// Try to load the shader if it's not in the cache
if (LoadShader(shader_path)) {
return *shader_cache[shader_path];
// Check if shader is available in disk cache first
const std::string filename = std::filesystem::path(normalized_path).filename().string();
std::string cache_path = std::string(SHADER_CACHE_DIR) + "/" + filename + ".cache";
if (std::filesystem::exists(cache_path)) {
try {
// Load the cached shader
std::ifstream cache_file(cache_path, std::ios::binary);
if (cache_file) {
cache_file.seekg(0, std::ios::end);
size_t file_size = static_cast<size_t>(cache_file.tellg());
if (file_size > 0 && file_size % sizeof(u32) == 0) {
cache_file.seekg(0, std::ios::beg);
std::vector<u32> spir_v;
spir_v.resize(file_size / sizeof(u32));
if (cache_file.read(reinterpret_cast<char*>(spir_v.data()), file_size)) {
vk::ShaderModule shader = BuildShader(device, spir_v);
if (IsShaderValid(*shader)) {
// Store in memory cache
std::lock_guard<std::mutex> lock(shader_mutex);
shader_cache[normalized_path] = std::move(shader);
LOG_INFO(Render_Vulkan, "Loaded shader from cache: {}", normalized_path);
return *shader_cache[normalized_path];
}
}
}
}
} catch (const std::exception& e) {
LOG_WARNING(Render_Vulkan, "Failed to load shader from cache: {}", e.what());
// Continue to load from original file
}
}
// Try to load the shader directly if cache load failed
if (LoadShader(normalized_path)) {
std::lock_guard<std::mutex> lock(shader_mutex);
return *shader_cache[normalized_path];
}
LOG_ERROR(Render_Vulkan, "Failed to load shader: {}", normalized_path);
return VK_NULL_HANDLE;
}
@ -116,37 +340,74 @@ void ShaderManager::ReloadShader(const std::string& shader_path) {
bool ShaderManager::LoadShader(const std::string& shader_path) {
LOG_INFO(Render_Vulkan, "Loading shader from: {}", shader_path);
if (!std::filesystem::exists(shader_path)) {
LOG_ERROR(Render_Vulkan, "Shader file does not exist: {}", shader_path);
return false;
}
try {
// TODO: read SPIR-V from disk [ZEP]
std::vector<u32> spir_v;
bool success = false;
// Check if the file exists and attempt to read it
if (std::filesystem::exists(shader_path)) {
std::ifstream shader_file(shader_path, std::ios::binary);
if (shader_file) {
shader_file.seekg(0, std::ios::end);
size_t file_size = static_cast<size_t>(shader_file.tellg());
shader_file.seekg(0, std::ios::beg);
spir_v.resize(file_size / sizeof(u32));
if (shader_file.read(reinterpret_cast<char*>(spir_v.data()), file_size)) {
success = true;
}
}
std::ifstream shader_file(shader_path, std::ios::binary);
if (!shader_file.is_open()) {
LOG_ERROR(Render_Vulkan, "Failed to open shader file: {}", shader_path);
return false;
}
if (success) {
vk::ShaderModule shader = BuildShader(device, spir_v);
if (IsShaderValid(*shader)) {
std::lock_guard<std::mutex> lock(shader_mutex);
shader_cache[shader_path] = std::move(shader);
return true;
shader_file.seekg(0, std::ios::end);
const size_t file_size = static_cast<size_t>(shader_file.tellg());
if (file_size == 0 || file_size % sizeof(u32) != 0) {
LOG_ERROR(Render_Vulkan, "Invalid shader file size ({}): {}", file_size, shader_path);
return false;
}
shader_file.seekg(0, std::ios::beg);
spir_v.resize(file_size / sizeof(u32));
if (!shader_file.read(reinterpret_cast<char*>(spir_v.data()), file_size)) {
LOG_ERROR(Render_Vulkan, "Failed to read shader data: {}", shader_path);
return false;
}
vk::ShaderModule shader = BuildShader(device, spir_v);
if (!IsShaderValid(*shader)) {
LOG_ERROR(Render_Vulkan, "Created shader module is invalid: {}", shader_path);
return false;
}
// Store in memory cache
{
std::lock_guard<std::mutex> lock(shader_mutex);
shader_cache[shader_path] = std::move(shader);
}
// Also store in disk cache for future use
try {
if (!std::filesystem::exists(SHADER_CACHE_DIR)) {
std::filesystem::create_directory(SHADER_CACHE_DIR);
}
std::string cache_path = std::string(SHADER_CACHE_DIR) + "/" +
std::filesystem::path(shader_path).filename().string() + ".cache";
std::ofstream cache_file(cache_path, std::ios::binary);
if (cache_file.is_open()) {
cache_file.write(reinterpret_cast<const char*>(spir_v.data()),
spir_v.size() * sizeof(u32));
if (!cache_file) {
LOG_WARNING(Render_Vulkan, "Failed to write shader cache: {}", cache_path);
}
} else {
LOG_WARNING(Render_Vulkan, "Failed to create shader cache file: {}", cache_path);
}
} catch (const std::exception& e) {
LOG_WARNING(Render_Vulkan, "Error writing shader cache: {}", e.what());
// Continue even if disk cache fails
}
LOG_ERROR(Render_Vulkan, "Failed to load shader: {}", shader_path);
return false;
return true;
} catch (const std::exception& e) {
LOG_ERROR(Render_Vulkan, "Error loading shader: {}", e.what());
return false;
@ -154,8 +415,99 @@ bool ShaderManager::LoadShader(const std::string& shader_path) {
}
void ShaderManager::WaitForCompilation() {
// No-op since compilation is now synchronous
// The shader_compilation_in_progress flag isn't used anymore
// Wait until no shader is being compiled
while (compilingShader.load()) {
std::this_thread::sleep_for(std::chrono::milliseconds(10));
}
// Process any pending commands in the queue
std::unique_lock<std::mutex> lock(commandQueueMutex);
while (!commandQueue.empty()) {
auto command = commandQueue.front();
commandQueue.pop();
lock.unlock();
command();
lock.lock();
}
}
// Integrate with Citron's scheduler for shader operations
void ShaderManager::SetScheduler(Scheduler* scheduler) {
SetGlobalScheduler(scheduler);
}
// Load multiple shaders in parallel
void ShaderManager::PreloadShaders(const std::vector<std::string>& shader_paths) {
if (shader_paths.empty()) {
return;
}
LOG_INFO(Render_Vulkan, "Preloading {} shaders", shader_paths.size());
// Track shaders that need to be loaded
std::unordered_set<std::string> shaders_to_load;
// First check which shaders are not already cached
{
std::lock_guard<std::mutex> lock(shader_mutex);
for (const auto& path : shader_paths) {
if (shader_cache.find(path) == shader_cache.end()) {
// Also check disk cache
if (std::filesystem::exists(path)) {
std::string cache_path = std::string(SHADER_CACHE_DIR) + "/" +
std::filesystem::path(path).filename().string() + ".cache";
if (!std::filesystem::exists(cache_path)) {
shaders_to_load.insert(path);
}
} else {
LOG_WARNING(Render_Vulkan, "Shader file not found: {}", path);
}
}
}
}
if (shaders_to_load.empty()) {
LOG_INFO(Render_Vulkan, "All shaders already cached, no preloading needed");
return;
}
LOG_INFO(Render_Vulkan, "Found {} shaders that need preloading", shaders_to_load.size());
// Use a thread pool to load shaders in parallel
const size_t max_threads = std::min(std::thread::hardware_concurrency(),
static_cast<unsigned>(4));
std::vector<std::future<void>> futures;
for (const auto& path : shaders_to_load) {
if (!std::filesystem::exists(path)) {
LOG_WARNING(Render_Vulkan, "Skipping non-existent shader: {}", path);
continue;
}
auto future = std::async(std::launch::async, [this, path]() {
try {
this->LoadShader(path);
} catch (const std::exception& e) {
LOG_ERROR(Render_Vulkan, "Error loading shader {}: {}", path, e.what());
}
});
futures.push_back(std::move(future));
// Limit max parallel threads
if (futures.size() >= max_threads) {
futures.front().wait();
futures.erase(futures.begin());
}
}
// Wait for remaining shaders to load
for (auto& future : futures) {
future.wait();
}
LOG_INFO(Render_Vulkan, "Finished preloading shaders");
}
} // namespace Vulkan

20
src/video_core/renderer_vulkan/vk_shader_util.h
View File

@ -10,6 +10,7 @@
#include <mutex>
#include <atomic>
#include <functional>
#include <vector>
#include "common/common_types.h"
#include "video_core/vulkan_common/vulkan_wrapper.h"
@ -17,6 +18,19 @@
namespace Vulkan {
class Device;
class Scheduler;
// Command queue system for asynchronous operations
void InitializeCommandQueue();
void ShutdownCommandQueue();
void SubmitCommandToQueue(std::function<void()> command);
void CommandQueueWorker();
// Scheduler integration functions
void SetGlobalScheduler(Scheduler* scheduler);
void SubmitToScheduler(std::function<void(vk::CommandBuffer)> command);
u64 FlushScheduler(VkSemaphore signal_semaphore = nullptr, VkSemaphore wait_semaphore = nullptr);
void ProcessAllCommands();
vk::ShaderModule BuildShader(const Device& device, std::span<const u32> code);
@ -36,6 +50,12 @@ public:
bool LoadShader(const std::string& shader_path);
void WaitForCompilation();
// Batch process multiple shaders in parallel
void PreloadShaders(const std::vector<std::string>& shader_paths);
// Integrate with Citron's scheduler
void SetScheduler(Scheduler* scheduler);
private:
const Device& device;
std::mutex shader_mutex;

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